1. Your BlackBerry ID is a master key to BlackBerry products, sites, services and applications such as BlackBerry World and BlackBerry Messenger.
   
2. From the home screen, swipe down from the top of the display to access Quick Settings.
   
3. Tap Settings.
   
4. Scroll to, then tap Blackberry ID.
   
5. Tap Sign In.
   Note: To create or manage your BlackBerry ID from a computer, go to http://us.blackberry.com/id.
   
6. Enter the desired username and password, then tap Sign In.
   
7. Sign-in is complete. Tap Edit to edit your profile if desired.